The Messaging Component has been completely redesigned so that the concept of MessageBus is first class citizen rather
than being DomainMessageBus. This means that instead of using the DomainMessageBusInterface one can use directly the MessageBusInterface.
This change has the benefit of allowing other types of messages bus for various needs in an application.
The DomainMessageBusInterface now extends the MessageBusInterface that takes MessageInterface and MessageHeaders.
In essence all Domain* classes and interfaces have been made to extend the generic classes and interfaces.
The DomainContext concept no longer exists and was replaced by the generic MessageBusContext. If you have
services that depend on the DomainContext, they should replace their reference to the new MessageBusContext.
The same goes for the DomainContextProvider that is now the MessageBusContextProvider.
The MultiDomainMessageHandlerResponse has been replaced by the MultiMessageHandlerResponse. This type of response also had
its status code attribution logic changed.
Now it will compute a status code based on the most common status code from its different responses, as well as giving a veto
for the FAILED status code, followed by weighting other failure codes as more important than any number of success codes.
The Authorization was improved to allow doing authorization before a response has been returned and after.
The supports method has been split into two methods: supportsPreAuthorization and supportsPostAuthorization.
The authorize method has been split into two methods: preAuthorize and postAuthorize.